df9c725fa0
This commit updates to the 0.9 version of the witx crate implemented in WebAssembly/wasi#395. This new version drastically changes code generation and how we interface with the crate. The intention is to abstract the code generation aspects and allow code generators to implement much more low-level instructions to enable more flexible APIs in the future. Additionally a bunch of `*.witx` files were updated in the WASI repository. It's worth pointing out, however, that `wasi-common` does not change as a result of this change. The shape of the APIs that we need to implement are effectively the same and the only difference is that the shim functions generated by wiggle are a bit different.
wiggle
Wiggle is a code generator for the host side of a witx interface. It is
invoked as a Rust procedural macro.
Wiggle is not specialized to any particular WebAssembly runtime. It is usable in at least Wasmtime and Lucet.
Learning more
Read the docs on docs.rs.
There are child crates for integrating with Wasmtime and Lucet.
The wasi-common crate is implemented using Wiggle and the wasmtime-wasi crate integrates wasi-common with the Wasmtime engine.
Andrew Brown wrote a great blog post on using Wiggle with Wasmtime.